Reusable code for building video games with Jogamp NEWT
Card, board & tiles making Software
8-bit Graphical API for Java
A very small multi-platform game engine for creating desktop games.
C-Lesh is a game programming language for 2D games.
Text-based adventure game creator and player. Comes with demo games.
CM Game Development Kit
A C++ library for programmers transitioning from "Game Maker Language"
CTFs as you need them
High-efficiency minimalist C++ wrapper for OpenGL 4.3
Map editor for the game Can I Scape
Portable game engine with main focus on point-and-click adventures